JPH0372973A - Spray gun having paint supply amount control means - Google Patents

Spray gun having paint supply amount control means

Info

Publication number
JPH0372973A
JPH0372973A JP1209442A JP20944289A JPH0372973A JP H0372973 A JPH0372973 A JP H0372973A JP 1209442 A JP1209442 A JP 1209442A JP 20944289 A JP20944289 A JP 20944289A JP H0372973 A JPH0372973 A JP H0372973A
Authority
JP
Japan
Prior art keywords
paint
flow rate
spray
spray gun
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1209442A
Other languages
Japanese (ja)
Inventor
Nobuyoshi Morita
信義 森田
Satoru Murata
悟 村田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anest Iwata Corp
Original Assignee
Anest Iwata Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anest Iwata Corp filed Critical Anest Iwata Corp
Priority to JP1209442A priority Critical patent/JPH0372973A/en
Priority to US07/511,771 priority patent/US5236128A/en
Publication of JPH0372973A publication Critical patent/JPH0372973A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2408—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the container or its attachment means to the spray apparatus
    • B05B7/241—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the container or its attachment means to the spray apparatus the container being pressurised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B05B12/008—Pressure or flow rate sensors integrated in or attached to a discharge apparatus, e.g. a spray gun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device

Abstract

PURPOSE:To always keep a stable spray amount without damaging operability by regulating a flow rate regardless of trigger operation, in an internal mixing type spray gun, by providing a flow rate control valve to the paint supply route communicating with a paint nozzle. CONSTITUTION:A flow rate control valve 3 controlling a flow rate area is provided to the paint supply route 2 of the paint nozzle 1a of an internal mixing type gun main body 1 in a freely detachable manner and a pressure container 4 is mounted to the leading end thereof. The flow rate control valve 3 has the taper valve seat sliding forwardly and rearwardly by a knob 5 arranged to the intermediate part thereof and communicates with a paint passage 8 having the paint pipe 7 facing to the pressure container 4 arranged to the lower end thereof to control the area of said passage 8. When spray pressure is changed and the pressure applied to the outlet part of a paint nozzle 1a is changed, the flow rate control valve 3 is preliminarily controlled to correspond to the change of the jet amount of the paint from a spray nozzle 12. Since the flow control, valve 3 is operated by the valve seat 6 having a taper surface, the fine adjustment of a flow rate can be performed regardless of the operation of a trigger 14 and operability is not damaged.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は内部混合式スプレーガンにおける塗料供給量制
御手段を有するスプレーガンに関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a spray gun having paint supply amount control means in an internal mixing spray gun.

〈従来の技術〉 内部混合式のスプレーガンは既に公知であるが、従来の
内部混合方式の場合、吹付空気と塗料とが噴霧口内に、
単に共に噴射される構成のため、その背圧が塗料ノズル
の出口部にかかり、吹付圧力が高くなるほど塗料の噴射
量が制限され、当然の結果として仕上りに影響するもの
である。<Prior art> Internal mixing type spray guns are already known, but in the case of the conventional internal mixing type, spray air and paint are mixed in the spray nozzle.
Because they are simply sprayed together, the back pressure is applied to the outlet of the paint nozzle, and as the spray pressure increases, the amount of paint sprayed is restricted, which naturally affects the finish.

一般に、スプレーガンの塗料ノズル口にはニードル弁が
装備されており、該ニードル弁の後退による開口面積の
増加によって噴出量が増加、調整できる構成となってい
る。この場合、噴出量を絞った状態ではニードル弁の後
退が−Ｆ分でなく、従って引金の作動が完全に引いた付
置でなく、中途で止めた状態となるのが詐通である。こ
のニードル弁は後部に塗料噴出量３１節ツマミを配設し
ていて、このニードルの後端をツマミに当てた位置まで
引金、即ちニードルが引ける仕組みとなっている。Generally, a paint nozzle port of a spray gun is equipped with a needle valve, and the amount of spray can be increased and adjusted by increasing the opening area by retracting the needle valve. In this case, in a state where the injection amount is restricted, the needle valve does not retreat by -F, and therefore, the trigger is not completely pulled, but is stopped halfway, which is a fraud. This needle valve has a 31-node knob for the amount of paint ejected at the rear, and the mechanism is such that the trigger, that is, the needle, can be pulled until the rear end of the needle touches the knob.

〈発明が解決しようとする課題〉 このため、８作上からみると中途半端であり、操作性が
悪いという結果になっている。<Problem to be solved by the invention> For this reason, compared to the 8th work, it is half-hearted and has poor operability.

また、塗料ノズルの噴出口は、ニードル弁の先端が位置
し開口面積を小さくしていることになり、噴霧開口形状
が正しい形に維持される保証がなく、噴出状態にバラツ
キが生ずる虞れが大である。即ち、円形の噴出口の中心
に二一ドルブを先端が位置すれば、円環状のスキマより
均一な状態で噴出されるが、ニードル弁先端が円形噴出
口のいずれか一方に寄った状態では反対側の開口部が大
きく、不均一な形となって噴出そのものが不規則な状態
となる。In addition, since the tip of the needle valve is located at the paint nozzle's spray opening, reducing the opening area, there is no guarantee that the spray opening will maintain the correct shape, and there is a risk of variations in the spraying state. It's large. In other words, if the tip of the needle valve is located in the center of the circular spout, the jet will be ejected more uniformly than in the annular gap, but if the tip of the needle valve is closer to either side of the circular spout, the jet will be ejected more uniformly. The opening on the side is large and has an uneven shape, making the ejection itself irregular.

この点より、噴出口はニードル弁を確実に後退させ、正
しい噴出開口状態を維持した状態で噴霧されることが望
ましい。From this point of view, it is desirable to reliably move the needle valve back and maintain the correct jet opening state before spraying.

本発明は上記実情に鑑み、内部混合式スプレーガンにお
いて、唸料供給経路の流路面積を調節することで、引金
操作に支障を来すことなく、Ｅ記課題を解決する塗料供
給量制御手段を有するスプレーガンを提供することを目
的としたものである。In view of the above-mentioned circumstances, the present invention provides paint supply amount control that solves the problem described in E without interfering with trigger operation in an internal mixing spray gun by adjusting the flow path area of the paint supply path. It is an object of the present invention to provide a spray gun having means.

く課題を解決するための手段〉 本発明は、空気キャップ内部にあって塗料と空気を混合
する内部混合式スプレーガンにおいて、塗料ノズルに連
通ずる塗料供給経路に流路面積を調節するｔｌｔｌ調量
弁を設けたものである。Means for Solving the Problems> The present invention provides an internal mixing spray gun that mixes paint and air inside an air cap, with a TLTl metering system that adjusts the flow path area in a paint supply path that communicates with a paint nozzle. It is equipped with a valve.

また、空気キャップ内部にあって塗料と空気を混合する
内部混合式スプレーガンにおいて、吹付空気圧力の一部
を加圧コンテナーに導入する導入通路を絞り通路とし、
該絞り通路の下流にニードル弁からなるリリーフ弁を設
けたものである。In addition, in an internal mixing spray gun that mixes paint and air inside an air cap, the introduction passage that introduces a part of the spray air pressure into the pressurized container is used as a throttle passage.
A relief valve consisting of a needle valve is provided downstream of the throttle passage.

また、この場合加圧コンテナーの導入部に二段階にノズ
ルを配したトリップフリー機構を設けるものである。In this case, a trip-free mechanism is provided in which nozzles are arranged in two stages at the introduction part of the pressurized container.

く作　用〉 上記のような構成のため、吹付圧が変化すると通常は塗
料ノズルの出口部にかかる圧力が変化し、それに伴って
ノズルからの噴出量が変化するが２予め塗料の絞り弁と
なる流量調節弁を設けておくことによって、塗料の供給
量を制御し、噴出驕変化に対応することができるため、
安定した塗装ができる。Due to the above structure, when the spray pressure changes, the pressure applied to the outlet of the paint nozzle usually changes, and the amount of spray from the nozzle changes accordingly. By installing a flow control valve, it is possible to control the amount of paint supplied and respond to changes in the ejection volume.
Allows for stable painting.

また、圧送用の加圧空気によって噴出量を調整する場合
、容器中に供給する加圧空気は絞り通路によってわずか
な空気を送り込み（少なくともや料噴出量と同じ情）、
且つ吹付停山時除々に蓄圧されないよう加圧空気調節弁
となるリリーフ弁で加圧空気を排出するものである。In addition, when adjusting the ejection amount using pressurized air for pressure feeding, the pressurized air supplied into the container sends a small amount of air through the throttle passage (at least the same situation as the amount of carbon dioxide ejected).
In addition, when the spray stops, the pressurized air is discharged by a relief valve that serves as a pressurized air control valve to prevent pressure from gradually accumulating.

また、この場合、加圧コンテナー内の塗料が加圧空気流
入口を塞がないようにトリップフリー機構で行なうもの
である。Further, in this case, a trip-free mechanism is used to prevent the paint in the pressurized container from blocking the pressurized air inlet.

〈実施例〉 以下、本発明を実施例の図面に基づいて説明すれば、次
の通りである。<Example> The present invention will be described below based on the drawings of the example.

第１図、第２図は塗料供給経路に絞り弁を配設する実施
例で、１は内部混合式ガン本体で。Figures 1 and 2 show an embodiment in which a throttle valve is installed in the paint supply path, and 1 is an internal mixing gun body.

この塗料ノズルａの塗料入口、即ち塗料ニップルからな
る塗料供給経路２に流量面積を調節する流量調節弁３を
着脱自在に設け、この先端に加圧コンテナー４を取付け
る。この流量調節弁３の構成は、中間にツマミ５で前後
摺動するテーパー弁シート６を配設し、加圧コンテナー
４に臨む塗料バイブ７を下端に配した塗料通路８と連通
し、この流路面積を調節するようにしてなる。９は加圧
空気通路、１０はバネ、Ｕは弁軸である。又、間中、１
２は噴霧ノズル、１３は空気キャップ、１４は引金であ
る。A flow control valve 3 for adjusting the flow area is detachably provided at the paint inlet of the paint nozzle a, that is, a paint supply path 2 consisting of a paint nipple, and a pressurized container 4 is attached to the tip thereof. The configuration of this flow rate control valve 3 is such that a tapered valve seat 6 is disposed in the middle and is slid back and forth with a knob 5, and a paint vibrator 7 facing the pressurized container 4 is communicated with a paint passage 8 disposed at the lower end. The road area will be adjusted. 9 is a pressurized air passage, 10 is a spring, and U is a valve stem. Also, during, 1
2 is a spray nozzle, 13 is an air cap, and 14 is a trigger.

ここにおいて、使用に当たり吹付圧力が変化すると塗料
ノズル１ａの出口部にかかる圧力が変化し、ノズルから
の噴出量が変化するが、この場合、予め塗料の流量調節
弁３を調節することで噴出量変化に対応させるものであ
る。この流量調節弁３はテーパー面を呈する弁とシート
をもって行なうため、微妙な流量調整は引金１４の操作
に関係なく行なうことができ、操作性を損なうことがな
い。Here, when the spraying pressure changes during use, the pressure applied to the outlet of the paint nozzle 1a changes, and the amount of spray from the nozzle changes. It allows us to respond to change. Since the flow rate adjustment valve 3 has a tapered valve and a seat, delicate flow rate adjustments can be made regardless of the operation of the trigger 14, without impairing operability.

また、第３図、第４図は加圧空気の調節で塗料の流量調
節を行なう他の実施例を示すものである。Further, FIGS. 3 and 4 show another embodiment in which the flow rate of paint is adjusted by adjusting pressurized air.

これはスプレーガンのハンドル部基端の空気導入口１５
に加圧空気３１節弁となるリリーフ弁１８を設けるもの
で、該リリーフ弁１Ｂは、空気通路に小さい絞り孔１７
を設けて吹付用空気を分岐し、チューブ１日によって加
圧コンテナー４の空気取入口１８に接続する０分岐した
空気は、チューブ１８に送られる前にニードル弁２０に
よりリリーフｊｌ’ｌＧから一部の空気は排気される構
造となっている。このニードル弁２０はシート部２１と
弁部２２をテーパーとしたもので軸方向に移動すること
によってスキマが僅かに変化し、そのスキマより加圧空
気が大気へ排出される。テーパー角は鋭角にするほど軸
方向への移動量に対し細かいｙＡ整が可能となる。This is the air inlet 15 at the base end of the handle of the spray gun.
A relief valve 18 serving as a 31-node valve for pressurized air is provided in the air passage, and the relief valve 1B has a small throttle hole 17 in the air passage.
The branched air is connected to the air intake port 18 of the pressurized container 4 by the tube 1. Before being sent to the tube 18, a part of the air is separated from the relief jl'lG by the needle valve 20. The structure is such that the air is exhausted. This needle valve 20 has a tapered seat portion 21 and a valve portion 22, and by moving in the axial direction, the gap changes slightly, and pressurized air is discharged to the atmosphere from the gap. The more acute the taper angle is, the finer the yA adjustment becomes possible for the amount of movement in the axial direction.

加圧式コンテナーの場合、容器内への加圧空気量が多す
ぎると、次第に内圧が高まり、ついては吹付空気加圧と
同じになってしまう、従って、これより低圧に維持し、
噴出量を調整するには逃し口２３で逃し量を調節して内
圧が所定の圧力に安定されるようにする必要がある。In the case of a pressurized container, if too much pressurized air is injected into the container, the internal pressure will gradually increase until it reaches the same level as the blown air pressure.
In order to adjust the amount of ejection, it is necessary to adjust the amount of relief through the relief port 23 so that the internal pressure is stabilized at a predetermined pressure.

加圧用チューブ１８は加圧コンテナー４の蓋４ａに設け
た供給口に接続される。接続口はトリップフリー機構２
４とし、供給ノズルを内部ノズル２４ａと外部ノズル２
４ｂの二段階に設けている。外部ノズル２４ｂは容器内
の塗料に面しており、揺れたりした塗料がノズルより逆
流あるいは塗着したまま徐々に固着が進み詰まることの
ないよう内側に拡大ｆｆ１（空間）を設け、その空間に
内部ノズル２４ａを開口させている。供給空気が送られ
ていないとき、ノズル内に塗料が入り込んだとしても内
部ノズル２４ａまでは入らず、外部ノズル２４ｂ部の塗
料は重力、或は次の供給空気流入により容器内に戻され
ることになる０図中、２５は圧力計である。The pressurizing tube 18 is connected to a supply port provided in the lid 4a of the pressurizing container 4. Connection port has trip-free mechanism 2
4, and the supply nozzles are internal nozzle 24a and external nozzle 2.
It is provided in two stages, 4b. The external nozzle 24b faces the paint in the container, and an enlarged space ff1 is provided inside to prevent the shaken paint from flowing backwards from the nozzle or from being stuck and clogging due to gradual sticking. The internal nozzle 24a is opened. When the supply air is not being sent, even if paint enters the nozzle, it will not reach the internal nozzle 24a, and the paint in the external nozzle 24b will be returned to the container by gravity or by the next inflow of supply air. In the figure, 25 is a pressure gauge.

〈発明の効果〉 」＝述のように本発明の塗料供給量制御手段を有するス
プレーガンは、塗料供給経路に流路面積を調整する流量
調節弁を設けたことにより、流量調節を引金操作に関係
なく行なうことができ、操作性を損うことがないと共に
、常に安定した噴霧量を維持することができる。又、流
量ｙ４Ｗ１弁は塗料供給経路に着脱自在に設けられてお
り、必要時のみ取付けることができる。<Effects of the Invention> As described above, the spray gun having the paint supply amount control means of the present invention has a flow rate adjustment valve that adjusts the flow path area in the paint supply path, so that the flow rate adjustment can be triggered. It can be carried out regardless of the situation, does not impair operability, and can always maintain a stable spray amount. Further, the flow rate y4W1 valve is detachably provided in the paint supply path, and can be attached only when necessary.

ヌ木発明は、吹付空気圧力の一部を加圧コンテナーに導
入する加圧空気調整構成としたことにより、スプレーガ
ンの引金操作に支障を来すことなく、加圧圧送される塗
料の供給量を制御し、安定した噴霧量を維持し得る。ま
たノズル部の部分的流出、それに伴なう部分的流速増加
、不均一による気液混合のムラを生ずることなく、噴出
量の調整を可能とし、安定した噴霧塗装ができる。The Nuki invention has a pressurized air adjustment structure that introduces a part of the spray air pressure into a pressurized container, thereby supplying paint that is fed under pressure without interfering with the trigger operation of the spray gun. It is possible to control the amount and maintain a stable spray amount. In addition, the spray amount can be adjusted without causing partial outflow from the nozzle, resulting in a partial increase in flow velocity, or uneven gas-liquid mixing due to non-uniformity, and stable spray coating can be achieved.

更に、また、加圧コンテナーの空気取入口に二段階にノ
ズルを配したトリップフリー機構を採用したことにより
、コンテナー内のゆ料が逆流したりする不具合を防止で
きる。Furthermore, by adopting a trip-free mechanism in which nozzles are arranged in two stages at the air intake port of the pressurized container, it is possible to prevent problems such as backflow of the liquid in the container.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の実施例を示すもので、第１図は要部の側
面図、第２図は流量調節弁の断面図、第３図は他の実施
例を示す側面図、第４図は加圧空気調節弁の断面図であ
る。 １７゜ １８゜ ２０゜ ２４゜ 、絞り孔 、チューブ 、ニードル弁 、トリップフリー機構The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main parts, FIG. 2 is a sectional view of the flow rate control valve, FIG. 3 is a side view showing another embodiment, and FIG. 4 is a side view of the main part. It is a sectional view of a pressurized air control valve. 17゜18゜20゜24゜, throttle hole, tube, needle valve, trip-free mechanism

Claims (1)

【特許請求の範囲】 １、空気キャップ内部にあって塗料と空気を混合する内
部混合式スプレーガンにおいて、塗料ノズルに連通する
塗料供給経路に流路面積を調節する流量調節弁を設けた
ことを特徴とする塗料供給量制御手段を有するスプレー
ガン。 ２、空気キャップ内部にあって塗料と空気を混合する内
部混合式スプレーガンにおいて、吹付空気圧力の一部を
加圧コンテナに導入する導入通路を絞り通路とし、該絞
り通路の下流にニードル弁からなるリリーフ弁を設けた
ことを特徴とする塗料供給量制御手段を有するスプレー
ガン。 ３、請求項２記載の塗料供給量制御手段を有するスプレ
ーガンにおいて、加圧コンテナーの導入部に二段階にノ
ズルを配したトリップフリー機構を設けたことを特徴と
する塗料供給量制御手段を有するスプレーガン。[Scope of Claims] 1. In an internal mixing spray gun that mixes paint and air inside an air cap, a flow rate adjustment valve is provided in a paint supply path communicating with a paint nozzle to adjust the flow path area. A spray gun with a characteristic paint supply amount control means. 2. In an internal mixing spray gun that mixes paint and air inside the air cap, the introduction passage that introduces a part of the spray air pressure into the pressurized container is a throttle passage, and a needle valve is connected downstream of the throttle passage. A spray gun having a paint supply amount control means, characterized by being provided with a relief valve. 3. A spray gun having a paint supply amount control means according to claim 2, wherein the paint supply amount control means is provided with a trip-free mechanism in which nozzles are arranged in two stages at the introduction part of the pressurized container. spray gun.
JP1209442A 1989-08-11 1989-08-11 Spray gun having paint supply amount control means Pending JPH0372973A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1209442A JPH0372973A (en) 1989-08-11 1989-08-11 Spray gun having paint supply amount control means
US07/511,771 US5236128A (en) 1989-08-11 1990-04-20 Spray gun with paint supply amount control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1209442A JPH0372973A (en) 1989-08-11 1989-08-11 Spray gun having paint supply amount control means

Publications (1)

Publication Number Publication Date
JPH0372973A true JPH0372973A (en) 1991-03-28

Family

ID=16572932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1209442A Pending JPH0372973A (en) 1989-08-11 1989-08-11 Spray gun having paint supply amount control means

Country Status (2)

Country Link
US (1) US5236128A (en)
JP (1) JPH0372973A (en)

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JP2009183824A (en) * 2008-02-04 2009-08-20 Toyota Boshoku Corp Coating device
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